Amazonian Antshrike (Thamnophilus amazonicus) [XC441806]
by Brice de la Croix from Iranduba, State of Amazonas, Brazil (song)
Amazonian Antshrike (Thamnophilus amazonicus) [XC793877]
by Oswaldo Cortes from Mit\u00fa Cachivera, Colombia (song)
Subspecies
Relationships uncertain. Has been treated as forming a superspecies with Variable Antshrike (Thamnophilus caerulescens), but possibly closest to the Slaty Antshrike (Thamnophilus punctatus) superspecies. South of R Amazon plumage variation is clinal, but apparent habitat differences suggest that populations may be distinct, although geographical limits of the three southern subspecies are tentative. Similarly, in north-west, some specimens and sight descriptions from western Amazonia suggest intermediacy in plumage between nominate and cinereiceps, but plumage and habitat differences again support the maintaining of subspecies. Further research is needed. Subspecies huallagae of Slaty Antshrike (Thamnophilus punctatus) has sometimes been considered to belong in present species.
The following 5 subspecies are recognised:
cinereiceps Pelzeln, 1868 - South-western Venezuela (western Amazonas), east-central Colombia (Vichada and Meta south to Caquetá and Vaupés) and north-western Brazil (both banks of upper R Negro and along western lower bank south to R Solimões).
divaricatus Mees, 1974 - Extreme eastern Venezuela (eastern Bolívar), the Guianas, and north-eastern Brazil north of R Amazon (east of R Branco and R Negro, east to northern Pará and Amapá).
amazonicus Sclater, 1858 - South-eastern Colombia (southern Amazonas), extreme eastern Ecuador (eastern Napo), eastern Peru, western Brazil south of R Amazon and west of R Tapajós (southern Amazonas and extreme western Pará south to Acre, Rondônia and western Mato Grosso) and northern Bolivia (Pando, northern La Paz, northern Beni, north-eastern Santa Cruz).
obscurus Zimmer, JT, 1933 - South-central Amazonian Brazil (southern Pará between R Tapajós and R Tocantins).
paraensis Todd, 1927 - East of R Tocantins in eastern Pará, western Maranhío and northern Tocantins.
BirdLife International Species Factsheet